/* Copyright (C) 2014 InfiniDB, Inc.

   This program is free software; you can redistribute it and/or
   modify it under the terms of the GNU General Public License
   as published by the Free Software Foundation; version 2 of
   the License.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
   MA 02110-1301, USA. */

//  $Id: framebound.cpp 3828 2013-05-22 17:58:14Z xlou $

// #define NDEBUG
#include <cmath>
#include <sstream>
using namespace std;

#include "idborderby.h"
using namespace ordering;

#include "framebound.h"

namespace windowfunction
{
int64_t FrameBound::getBound(int64_t b, int64_t e, int64_t c)
{
  if (fBoundType == WF__UNBOUNDED_PRECEDING)
    return b;

  return e;
}

const string FrameBound::toString() const
{
  ostringstream oss;

  switch (fBoundType)
  {
    case WF__UNBOUNDED_PRECEDING: oss << "unbound preceding"; break;

    case WF__UNBOUNDED_FOLLOWING: oss << "unbound following"; break;

    case WF__CONSTANT_PRECEDING: oss << "constant preceding"; break;

    case WF__CONSTANT_FOLLOWING: oss << "constant following"; break;

    case WF__EXPRESSION_PRECEDING: oss << "expression preceding"; break;

    case WF__EXPRESSION_FOLLOWING: oss << "expression following"; break;

    case WF__CURRENT_ROW:
    default: oss << "current row"; break;
  }

  oss << endl;

  return oss.str();
}

}  // namespace windowfunction
